Will be difficult for Skype to take this risk - they aren't that big in India. But I bet that if WhatsApp blocks Airtel IPs for just 1 days, airtel would see 100% of their users typing up airtel's customer service lines to ask why they cannot access WhatsApp. But I doubt if WA has the guts to try something like this.

Frankie70 writes: Apple invested more than $1 billion in an effort to make sapphire one of iPhone 6's selling point. But iPhone 6 released without the sapphire screen. GT Advanced Technologies, the small company chosen to supply Apple with enormous quantities of cheap sapphire, declared bankruptcy a month later. Recent documents from GT’s bankruptcy proceedings, and conversations with people familiar with operations at Apple and GT, provide several clues as to what went wrong. GT said that to save costs, Apple decided not to install backup power supplies, and multiple outages ruined whole batches of sapphire. The terms Apple negotiated committed GT to supplying a huge amount of sapphire, but put Apple under no obligation to buy it. In its bankruptcy documents, GT would later accuse Apple of using “bait-and-switch” tactics, and said the terms of the deal were “onerous and massively one-sided.”Link to Original Source